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Forum Discussion
Mixing drive makes/models within a NAS
firmware 6.7.4 readynas 2120 I have my nas configured as a raid 5 (4 disk, 2tb/disk). I need to expand my storage capacity. I was going to put in 4tb hard drives. My plan was to pull out 1 o...
FG wrote:
Not sure I follow, is that good or bad or neither?
Neither, it's just true.
Here's a shorter version: Default XRAID gives you the same protection benefits as RAID-5 - and it works with mixed disk sizes (which RAID-5 doesn't do). So just leave it on.
If you have mixes disk sizes how does the redundancy work?
If the disks are all sames I understand how it works, but if you have 3---2tb and 1---4tb then how can redundancy be spread equally across the 4 disks?
RAID 5. This RAID level also provides data redundancy, but it requires at least three disks. RAID 5 uses
the capacity of one disk to protect you from data loss if one disk fails.Your data is distributed across
multiple disks to improve disk performance. The total capacity of your storage system equals the capacity
of all your disks minus the capacity of one disk. It is supported on systems with at least four drive bays.
X-RAID uses the capacity of one disk for data storage and reserves the capacity of a second disk for data
protection, which allows the volume to recreate data if a disk fails. In a two-disk system, the usable storage
space is one disk. In a three-disk system, the usable storage space is two disks. In general, the total capacity
of your storage system equals the capacity of all your disks minus the capacity of one disk.
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